The First Key Comparison of Primary Standard Gas Mixture of the Brazilian National Metrology InstituteA.L. Fioravante, C. R. Augusto, E.C.S. Elias, M.C. Brum, D.C.G.S. Teixeira, C.C. Ribeiro, R.J. Oudwater, F.A. Fagundes, M.C. da Silva et R.G. ReisInternational Congress of Metrology, (2013) 10006DOI: https://doi.org/10.1051/metrology/201310006